/*
Error: 在 $colors 里没找到 gray 这个key
        on line 5 of sass/customed function.scss

1: $colors:(light:#ffffff, dark: #000000);
2: 
3: @function color($key) {
4:     @if not map-has-key($colors, $key ){
5:         @error "在 $colors 里没找到 #{$key} 这个key"
6:     }
7:     @return map-get($colors, $key);
8: }
9: 
10: body{

Backtrace:
sass/customed function.scss:5
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:224:in `visit_error'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:36:in `visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/stack.rb:79:in `block in with_base'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/stack.rb:135:in `with_frame'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/stack.rb:79:in `with_base'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:158:in `visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:298:in `block (2 levels) in visit_if'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:298:in `map'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:298:in `block in visit_if'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:297:in `visit_if'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:36:in `visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/stack.rb:79:in `block in with_base'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/stack.rb:135:in `with_frame'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/stack.rb:79:in `with_base'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:158:in `visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:10:in `visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/script/tree/funcall.rb:261:in `block (3 levels) in perform_sass_fn'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/script/tree/funcall.rb:261:in `each'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/script/tree/funcall.rb:261:in `block (2 levels) in perform_sass_fn'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/script/tree/funcall.rb:260:in `catch'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/script/tree/funcall.rb:260:in `block in perform_sass_fn'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:84:in `perform_arguments'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/script/tree/funcall.rb:257:in `perform_sass_fn'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/script/tree/funcall.rb:140:in `block in _perform'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/stack.rb:108:in `block in with_function'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/stack.rb:135:in `with_frame'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/stack.rb:108:in `with_function'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/script/tree/funcall.rb:139:in `_perform'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/script/tree/node.rb:50:in `perform'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:398:in `visit_prop'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:36:in `visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/stack.rb:79:in `block in with_base'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/stack.rb:135:in `with_frame'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/stack.rb:79:in `with_base'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:158:in `visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:440:in `block (2 levels) in visit_rule'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:440:in `map'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:440:in `block in visit_rule'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:438:in `visit_rule'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:36:in `visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:158:in `block in visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/stack.rb:79:in `block in with_base'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/stack.rb:135:in `with_frame'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/stack.rb:79:in `with_base'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:158:in `visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:52:in `block in visit_children'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:52:in `map'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:52:in `visit_children'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:167:in `block in visit_children'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:179:in `with_environment'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:166:in `visit_children'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:36:in `block in visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:186:in `visit_root'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/base.rb:36:in `visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:157:in `visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/visitors/perform.rb:10:in `visit'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/root_node.rb:36:in `css_tree'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/tree/root_node.rb:29:in `render_with_sourcemap'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/engine.rb:389:in `_render_with_sourcemap'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/engine.rb:307:in `render_with_sourcemap'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/plugin/compiler.rb:462:in `update_stylesheet'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/plugin/compiler.rb:215:in `block in update_stylesheets'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/plugin/compiler.rb:209:in `each'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/plugin/compiler.rb:209:in `update_stylesheets'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/plugin/compiler.rb:443:in `on_file_changed'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-3.7.4/lib/sass/plugin/compiler.rb:320:in `block in watch'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-listen-4.0.0/lib/sass-listen/event/config.rb:23:in `call'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-listen-4.0.0/lib/sass-listen/event/processor.rb:115:in `_process_changes'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-listen-4.0.0/lib/sass-listen/event/processor.rb:19:in `block in loop_for'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-listen-4.0.0/lib/sass-listen/event/processor.rb:15:in `loop'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-listen-4.0.0/lib/sass-listen/event/processor.rb:15:in `loop_for'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-listen-4.0.0/lib/sass-listen/event/loop.rb:84:in `_wait_for_changes'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-listen-4.0.0/lib/sass-listen/event/loop.rb:42:in `block in setup'
/Users/luobin/.rvm/rubies/ruby-2.7.2/lib/ruby/gems/2.7.0/gems/sass-listen-4.0.0/lib/sass-listen/internals/thread_pool.rb:6:in `block in add'
*/
body:before {
  white-space: pre;
  font-family: monospace;
  content: "Error: 在 $colors 里没找到 gray 这个key\A         on line 5 of sass/customed function.scss\A \A 1: $colors:(light:#ffffff, dark: #000000);\A 2: \A 3: @function color($key) {\A 4:     @if not map-has-key($colors, $key ){\A 5:         @error \"在 $colors 里没找到 #{$key} 这个key\"\A 6:     }\A 7:     @return map-get($colors, $key);\A 8: }\A 9: \A 10: body{"; }
